android-activity

问题 I was reading through a lot of topics today regarding this. However, all the solutions that I had seen, failed to be a solution for me. I am new in Android development. My problem is that I had two buttons in my main page - namely PlayGame and Help. The PlayGame onClicked() will direct the user to the "difficulty page" where the user can choose Easy, Medium or Hard mode. What I want is that when the user pressed the Android back button in the "difficulty page", it will go back to the main

问题 I've been putting AdMob ads in an otherwise working Android app, following the instructions here. The app has 2 activities. One of them is only reachable from the first. I'm currently adding ads to this second activity. I've tried both creating an AdView programmatically in the onCreate method and adding appropriate code to the XML layout file for the Activity. In both cases the activity will exit the second Activity and go to the first as if the back button had been pressed as soon as it

问题 I want to make a phone call and after the call ends I want to come back the Activity which started a call. Code to start a call : // Start a call Intent callIntent = new Intent(Intent.ACTION_CALL); callIntent.setData(Uri.parse("tel:" + phoneNumber)); startActivity(callIntent); Code to handle coming back to activity : // Monitor phone call activities private class PhoneCallListener extends PhoneStateListener { private boolean isPhoneCalling = false; String TAG = "PhoneCallListener"; @Override

问题 I want to make a phone call and after the call ends I want to come back the Activity which started a call. Code to start a call : // Start a call Intent callIntent = new Intent(Intent.ACTION_CALL); callIntent.setData(Uri.parse("tel:" + phoneNumber)); startActivity(callIntent); Code to handle coming back to activity : // Monitor phone call activities private class PhoneCallListener extends PhoneStateListener { private boolean isPhoneCalling = false; String TAG = "PhoneCallListener"; @Override

问题 I want to make a phone call and after the call ends I want to come back the Activity which started a call. Code to start a call : // Start a call Intent callIntent = new Intent(Intent.ACTION_CALL); callIntent.setData(Uri.parse("tel:" + phoneNumber)); startActivity(callIntent); Code to handle coming back to activity : // Monitor phone call activities private class PhoneCallListener extends PhoneStateListener { private boolean isPhoneCalling = false; String TAG = "PhoneCallListener"; @Override

问题 In my Android app, I am trying to simply go back to my main Activity once a video that I am playing ends. I have tried many workarounds, but I can't find a way to call StartActivity from the video onCompletionListener - I am getting the "cannot make a static reference to the non-static method startActivity(Intent) from the type Activity" error. I tried getting a context from the Activity that preceded the videoView, and passing that to the intent/startActivity. That allowed the app to compile

问题 EDIT: I've found that what I'm describing below only occurs on my emulated device (Nexus 5, target api 19, 4.4.2 with Intel Atom (x86) cpu), but NOT on my physical device (HTC One).... EDIT2: Edit1 was due to an IllegalStateException that I didnt catch. Added some code to check if the thread was already running before trying to start it. This combined with the accepted answer resolved my issue. I have implemented an activty that starts a new thread in the activity's onCreate method, like this

问题 I'm using Wakelock in my application to prevent the phone from sleeping when the app is visible. The problem comes when there is an orientation change and the system destroys and re-creates the app in landscape mode. If the wakelock timer has expired in the background the system takes the release of wakelock as an opportunity to switch off the screen. Edit: I should mention that I am setting Wakelock onResume, and releasing onPause - as I understand it, it's necessary to release then to

问题 I'm using Wakelock in my application to prevent the phone from sleeping when the app is visible. The problem comes when there is an orientation change and the system destroys and re-creates the app in landscape mode. If the wakelock timer has expired in the background the system takes the release of wakelock as an opportunity to switch off the screen. Edit: I should mention that I am setting Wakelock onResume, and releasing onPause - as I understand it, it's necessary to release then to

问题 I'd like to show when pressed a button a popup onto my Activity. I was inspired by this question So I use the "merge" control in the content xml of the activity and put in it the 2 different Layouts, the problem occurs obviously at this line (code taken from the question linked above): FragmentManager fragmentManager = getFragmentManager(); fragmentManager.beginTransaction() .add(R.id.overlay_fragment_container, yourFragment) .commit(); because ofc FragmentManager works for Fragments. My